Scaffold.



G. E. LILLO W. SGAFFOLD.

APPLICATION FILED APR. 19, 1912. v 1,060,914. Patented May 6,1913.

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CHARLES E. LILLOW, or

SGAFFOLD.

' Specification of Letters Patent.

Application filed April 19, 1912. Serial No. 691,883.

1 To all whom it may concern Be'it known that 1, CHARLES E. LILLOW, asubject of the King of Great Britain, re siding at Chicago, in thecounty of Cook and State of Illinois, have invented new and usefulImprovements in Scafiolds, of which the following is a specification. a

This invention relates to scaffolds of that class that are used byworkmen as a support or platform upon which to stand in doing variouskinds of work in connection with buildings or other raised structures.

The main object of this invention is to provide a scaffold of cheap,simple and improved construction; one which may be readily assembled or'may be extended both vertically and horizontally to increase its heightand longitudinal extent.

Another object is to provide a scaffold which shall be of rigid andsubstantial construction.

Another object that may be erected without the use of nails or otherlike fastening devices for securing together the several parts of thescaffolds.

Other objects and advantages will appear in the course of thisspecification and with all of said objects and advantages in view, thisinvention consists in the several novel features of construction,arrangement and combination of parts hereinafter. set forth andparticularly defined in the claims.

The invention is clearly illustrated in the drawings furnished herewith,in which:

Figure 1 is a perspective view of one section of a scalfold embodyingthe present invention and showing in dotted lines certain longitudinalmembers of a second section, Fig. 2 is a plan of a scafiold containingtwo sections, Fig. 3 is a side elevation,

, partly broken away, of a connecting bracket forming part of thepresent invention, showing the same in operative position on an uprightwith a horizontal member clampedthereby, Fig. 4* is a side view of theparts seen in Fig. 3, and looking in the'direction of the arrow 4, Fig.5 is a side elevation of a joint between two uprights set end to end,

Fig. 6 is a view of the parts seen in Fig. 5,"

looking in the direction of the arrow 6, in Fig. 5, and Fig. 7 is aperspective view of a fragment of one'end of an upright.

Referring to said drawings and particularly to Figs. 1 and 2, a numberof uprights and intermediate said holes.

taken apart and which.

is to provide a scafiold' or posts represented at 10, are shown,saiduprights being preferably provided with removable casters or otherrolling supports 11, at their lower ends. Connected to 'said uprightsare a series of longitudinally exverse supporting bars 13, and diagonalbrace bars or struts 14. Each upright 10, is'pro-- vided with two seriesof transverse holes 15, 16, the holes 15, extending therethroug'h in onedirection and the holes 16, extending therethrough at right angles tothe holes 15, The holes are spaced equidistant from each other in stag--gered relation beginning with a-hole at the very top edge and ending atthe bottom edge of the upright. At the ends of the uprights,

however, two holes or rather semi-circular intersecting notches,(seeFigs. 5 and 7) are provided, so that whenever any two uprights areplaced end to end, two, complete holes are formed at't-he joint. Thelongitudinal and transverse supporting bars 12, 13, may be provided withequidistant holes 17, to aid the person, erecting the scaffold, inlocating described, may be fastened together by bolts and nuts, whichwill make a perfectly rigid structure, although it is preferred to usethe brackets, one ofwhich will now be de-"' scribed.

Referring now to Figs. 3 and 4, the bracket 18, is shown as comprisinga, vertical arm 19, arranged to lie against one side of an upright 10,and having a pin 20, extending at right angles to said arm 19, andarranged to be thrust into any one of the holes 15, 16, in any of theuprights 10. At its lower end said arm 19,.extends for ward beyond theupright and is formed with across the side of the upright that lies atright angles to the side against which is placed the arm 19. The lowerend of said arm '19, is formed with a vertical flange below and at rightangles to the hole in .11

Patented May 6, 1913.

tending supporting bars 12, a series of transthe bars, and if desiredthe parts, heretofore a horizontal ledge 21, arranged to extend 22,which also extends down from the rear edge of the horizontal ledge 21,and said The vertical 27, threaded in said post 26, and adapted to bearagainst any bar that may be placed upon the ledge 21, of the bracket 18.The bracket may be readily attached to any upright at any place thereonWhere the holes occur and in securing the bracket in place, the pin 20,is first inserted in one of the holes 15, 16, after which the verticalflan e 22, is swung down against the side of tfie upright, bringing thepin 23, into the next hole below and at right angles to the one in whichthe pin 20, has been inserted. The weight of the bar resting upon theledge 21, is transferred to, the upright by both pins 20, 23, and whenthe set screw 27, is screwed up tight, it is practically impossible forthe bar to work loose and the bracket to become detached from thesupport. 1

The joint between any two uprights is best seen. at Figs. 5 and 6, andas shown comprises two plate like members 28, adapted to lie on oppositesides of two end'to end arranged uprights, and said parts are boltedtogether by bolts 29, 30, extending through said plates and uprights.The ends of each plate 28, is formed with notches 31, for the receptionof the bolts 29, and adjacent to said notches the plate is provided withlugs 32, that form shoulders against which bear the heads of the bolts29', and their nuts or washers. Said plates are formed with lateralflanges 33, adapted to embrace the' sides of the uprights at theirmeeting edges and if desired the inner face ofeach plate 28, may beprovided with one or more sharp prongs 34, that sink into the uprights.'In fastening two uprights to-' gether, two plates placed on either sideof the two uprights to be joined together, the center hole of the platesbeing made to reg ister with the holes formed by'the se1n1- circularnotches at the joint between the two uprights. The bolts are then'thrustthrou h the holes in the uprights and plates and t e nuts screwed down.To disconnect the two uprights the nuts are partially unscrewed to bringthe heads of the upper and lower bolts and their nuts and washersbeyond'the lugs 32, whereupon the upper upright may be disconnected fromthe remainder, the upper bolt-29, moving out through the notches 31, inthe plates. The plates may then be removed from the lower upright bylifting them off the upright, inasmuch as the bolt 29, is free to passout through the open notches 31, at the lower end of the plates.

It is seen that the pairs of plates 28, remain held together by themiddle bolt and nut 30', whereas the bolts 29, may remain in the ends ofthe uprights.

In erecting the scafiolds the brackets 18, aresecurcd in place at theproper points to bring the horizontal members at the desired heights,the horizontal bars and diagonal brace bars laid upon said brackets andclamped in place by the set screws 27. If desired the ends of thehorizontal bars 12, 13, may be caused to project sufficiently beyond theuprights to receive planks for the workmen to stand upon. If it'isdesired to extend the scaffolding in a horizontal direction eitherlengthwise or crosswise, other horizontal supporting bars may be securedin place upon the uprights by means of the brackets 18, and otheruprights, transverse horizontal bars and diagonal brace bars may beadded thereto to complet e the extended structure. If it is desired toextend the scaffold vertically, other uprights may be secured in placeupon the upper ends of the uprights first installed in place andthereafter the horizontal and diagonal brace bars clamped in place bythe brackets. In this way scaffolding may be built whose extent ispractically unlimited and which because of its rigidity and strength maybe built to reach great height.

It is to be observed that by reason of the herein described system ofholes in the upright and other scaffold members connected thereto, thesize and shape of each scaffold section maybe varied to accommodatepractically any given condition and requirement. By adding othersections thereto the scaffolding may be extended longitudinally,transversely or vertically to any practical extent.

I realize that Various alterations and modifications of this device arepossible without departing from the spirit of my invention, and I do nottherefore desire to limit myself to the exact form of construction shownand described.

I claim as new and'desire to secure by Letters Patent:

1. In a scaffold, the combination with an upright having two series ofequidistant holes therein, the one series disposed at right angles tothe other and midway therebetween, and a cross member to be secured tosaid upright, of a bracket for connecting together said upright andcross -member, comprising a vertical arm having a horizontal pin, rigidthereon, and adapted to enter and seat in any of said holes in theupright, and a ledge portion projecting out and seat 1n the nextadjacent hole below the one that receives the first named pin, saidledge being adapted to receive and support said cross member and havingclamping means for clamping the cross member upon the upright.

'2. In a scafi'old, the combination with an upright having two series ofequidistant holes therein, the one series disposed at right angles tothe other and midway therebetween, and a cross member to be secured tosaid upright, of a bracket for connecting together said upright andcross members, comprising a vertical arm and flange of right angleformation arranged to embrace a corner of the upright, two horizontalpins, rigid on said bracket'and disposed at right angles to each other,said pins being arranged to enter and seat in two adjacent, angularlydisposed holes in the upright, a horizontal ledge formed upon the lowerpart of the bracket for receiving and supporting the cross member, anupright post extending up from said ledge and a screw, threaded in saidpost and adapted to bear against the cross member to clamp the same tothe upright.

3. In a scafiold, the combination with an upright having two series ofequidistant holes therein, the one series disposed .at right angles tothe other and midway therebetween, and a cross member to be-secured tosaid upright, of a bracket for connecting together said upright andcross members, comprising a vertical arm and flange of right angleformation, arranged to embrace one corner of the upright, a horizontalpin, rigid with and projecting from said arm, and a horizontal pin,rigid with and projecting from said flange, said pins being disposed atright angles to each other and spaced apart a distance equal to thedistance between any two adjacent, angularly disposed holes in theupright, and adapted to enter and seat therein, the lower 'pin' havingits upper edge'cut away on an arc of a circle struck from the axis ofthe upper pin as acenter, a horizontal supporting ledge,

for the cross member, formed on said flange,

an upstanding post formed on said ledge,

and a screw, threaded in the post and adapted to bear against said crossmember to 'clamp the same to the upright.

4. In a scaffold, the combination with two upright members, set end toend, and each having two series of equidistant holes formed therein, oneseries beginning at the extreme or meeting ends of the uprights, and theother series being disposed at right angles to the first series andlocated midway therebetween, and each upright being further provided atits extreme or meeting end with a hole in line with the holes of thesecond series, of two oppositely arranged plates arranged at the meetingends of the uprights, said plates having vertical side flanges arrangedto embrace the sides of the uprights and having three bolt holesarranged in vertical alinement, and bolts and nuts for clamping togetherthe plates and uprights, of which the bolts extend through the holes inthe plates and the three nearest holes in the uprights, including one atthe meeting edges therof.

5. In a scaffold, a joint between two upright members, placed end toend, said joint comprising two vertical plates, arranged to lie onopposite sides of the uprights at their adjacent ends, and havingvertical flanges embracing the other sides of said uprights, each platebeing formed with a central bolt hole, and a notch at each end extendingtoward said bolt hole, and being further CHARLES E. LILLOW.

Witnesses:

CHARLES O. SHERVEY, FANNIE F. RICHARDS.

